Band-saw-filing machine



(No Model.) Y

A.A S. DUNN. BAND SAW FILINGYMAGHINE.

No. 383,944. Patented June 5, 1888'.

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ANDREW S. DUNN, OF NEW BRIGHTON, PENNSYLVANIA.

BAND-SAW-FIL SPECIFICATION forming part of Letters Application filedFebruary 2S, 1887,

To @ZZ whom it may concern.:

Be it known that I, ANDREW S. DUNN, a citizen of the United States,residing at New Brighton, in the county of Beaver and State ofPennsylvania, have invented an Improvement in BandSaw-Filing Machines,of which the following is a spectication.

My invention relates to an improvement in band-saw-ling machines; and itconsists in the mechanism hereinafter described for filing a bandsawwithout displacing it from the wheels of the machine on which it runs atasingle continuous operation, the operation of which mechanism willhereinafter more fully and at large appear.

To enable others skilled in the art to which myinvention is most nearlyconnected to make' and use it, I will proceed to describe itsconstruction and operat-ion.

In the accompanyingV drawings, which form part of my specification,vFigure l is a front elevation of my improvement in machines for filingbandfsaws. Fig. 2 is a top view of the same; and Fig. 3 is a perspectiveback View of tile-holder, slide,crossl`1ead, and saw-clamp.

In the accompanying drawings, A represents the frame of machine; B,thelegs; C, the vertical V'slide, in which slides tile cross-head D.From the lower part of vertical slide O, and at right angles with thesame, at each end of machine, extend two V-slides, which slide inV-grooves E, Fig. l, under the caps F, Figs. 1 and 2. On the front sideof iile crosshead D is a pin or bearing, G, on which bearing runs oneend of the adjusting pitman-rod H, which pitman-rod is in three pieces,allowing of the iile, which is attached to the back side of lecross-head D, being moved out of mesh with the teeth of the saw beingfiled when the file makes its backward motion. The other end of rod H isconnected to a bearing on wheel I, whichw-heel I at the periphery has aflange thereon, which ange has two variable offsets the Wheel, whichflange, as the wheel is turned around through the medium of crank J,runs between guiderollers K, which guide-rollers are attached to aconnectingpiece between the horizontal slides on the vertical le-slideC. The variable rim on the Wheel I working between the guide-rollers K,which are connected, as shown, with horizontal slides under ING MACHINE.

Patent No. 383,944, eaten-aaa@ 5, 188e.

Serial No. 229,233. (No model.)

,plates F, gives the tile-slide C, with its crosshead D, on which is thetile L, its in-and-out motion. The adjusting pitman-rod H, beingconnected to wheel I, gives back-and-forward motion to the iilecross-head D and the file L.

In Fig. 3, M is the saw-clamp, between the clamps of which thesaw N ismoved upward by the adjustable saw-raising device O coming in contactwith the under side of the next tooth following the one that has beenalready led. The forward motion of the le-slide D,through the medium ofthe adjustable saw-raising device O passing under the under side oftooth next below the one already led, raises said tooth to the level ofthe top of le L as the Wheel I is turned around bythe crank J or otherpower applied at l?. Vhen the full stroke of adjusting pitmanrod K isexhausted, the file then stands with the heel or butt ofthe tile stillin mesh with the tooth of the saw N, as shown in Figs. l and 2, at whichpoint the offset in the flange of the wheel I, moving between theguide-rollers K,moves back the file- 'slide C, the file cross-head D,and the file L.

The adjusting pitn1an-rod then moving off the Acenter downwardly byconnection with the file cross-head draws said cross-head backward thefull stroke of adjusting pitman-rod H, at which point the offset on theopposite side diainetrically of the wheel I, coming between the rollersK, gives the inward motion to the file-slide C, to file cross-head D,and to file L, thereby bringing saw-raising device O to the underside ofthe tooth below the one already tiled.

From the foregoing description and by reference to the accompanyingdrawings the ski1l ful mechanic will readily understand the constructionof my improvement in machines for tiling bandsaws and the relation thatthe several parts bear to each other. I will therefore proceed todescribe the operation.

The machine is placed in position on its feet on the table of a bandsawing-machine. The front or part to which power is applied facing thesame direction as the teeth of the bandsaw, the loose portion of clamp Mis placed over the saw, with its shoulder R at the back of it, in suchposition that sawraising device O comes in the position shown in Fig. 3.It

-is then ready to begin the operation of filing.

ICO

The operator then turns crank J, moving for ward in leslide C the filecrosshead D. When the file reaches the point Q (shown in Figs. 1 and 2)through the medium of the offset in the flange of wheel I, the file isdrawn 5 outwardly. The pitman then traveling downwardly until it comeson its opposite center, at which point the opposite offset inthe flangeof the wheel I comes between the guide-rollers K, gives the inwardmotion to the file-slide xo C, the tile cross-head D thereby bringingthe point of saw-raising device O under the tooth of saw N, next belowthe tooth already filed, the continuation of which operation les a toothof the saw N at every revolution of the I5 Wheel I.

Witnesses:

ADoLP-I HAEFELE, JAMES HALL.

